Fix opening library in encryption example

examples/encryption/android/app/build.gradle

@@ -47,7 +47,7 @@ android {
         applicationId "com.example.drift_encryption_sample"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 21
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

examples/encryption/android/build.gradle

@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

examples/encryption/lib/database.dart

@@ -1,9 +1,12 @@
+import 'dart:ffi';
 import 'dart:io';
 
 import 'package:drift/drift.dart';
 import 'package:drift/native.dart';
 import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
+import 'package:sqlcipher_flutter_libs/sqlcipher_flutter_libs.dart';
+import 'package:sqlite3/open.dart';
 
 part 'database.g.dart';
 
@@ -39,6 +42,14 @@ QueryExecutor _openDatabase() {
 
     return NativeDatabase.createInBackground(
       File(p.join(path.path, 'app.db.enc')),
+      isolateSetup: () async {
+        open
+          ..overrideFor(OperatingSystem.android, openCipherOnAndroid)
+          ..overrideFor(OperatingSystem.linux,
+              () => DynamicLibrary.open('libsqlcipher.so'))
+          ..overrideFor(OperatingSystem.windows,
+              () => DynamicLibrary.open('sqlcipher.dll'));
+      },
       setup: (db) {
         // Check that we're actually running with SQLCipher by quering the
         // cipher_version pragma.

examples/encryption/lib/main.dart

@@ -1,20 +1,9 @@
-import 'dart:ffi';
-
 import 'package:drift/drift.dart';
 import 'package:flutter/material.dart';
-import 'package:sqlite3/open.dart';
-import 'package:sqlcipher_flutter_libs/sqlcipher_flutter_libs.dart';
 
 import 'database.dart';
 
 void main() {
-  open
-    ..overrideFor(OperatingSystem.android, openCipherOnAndroid)
-    ..overrideFor(
-        OperatingSystem.linux, () => DynamicLibrary.open('libsqlcipher.so'))
-    ..overrideFor(
-        OperatingSystem.windows, () => DynamicLibrary.open('sqlcipher.dll'));
-
   runApp(const MyApp());
 }